/* Research homepage: a single visual system for all four content sections. */
.home-page { background: #fafafc; }
.stream-hero {
  position: relative;
  height: calc(100svh - 69px);
  min-height: 680px;
  max-height: 1100px;
  overflow: hidden;
  background: #070b12 url('../../images/stream-poster.jpg?v=population-20261027') center / cover no-repeat;
  color: #edf1f8;
}
#stream-canvas { display: block; width: 100%; height: 100%; touch-action: pan-y; }
.hero-profile {
  position: absolute; top: 44px; left: 0; right: 0;
  display: flex; align-items: center; gap: 22px;
  pointer-events: none;
}
.profile-avatar { width: 78px; height: 78px; flex: 0 0 78px; border-radius: 12px; object-fit: contain; }
.hero-profile h1 { font-size: 42px; letter-spacing: -.035em; margin: 0 0 10px; line-height: 1.05; font-weight: 500; }
.hero-profile p { font-size: 14px; line-height: 1.65; color: #b5bfce; margin: 0; }
.stream-caption {
  position: absolute; bottom: 42px; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: end; gap: 40px;
  pointer-events: none;
}
.stream-caption p { font-size: 13px; color: #acb7c7; margin: 0; line-height: 1.6; }
.stream-caption .stream-caption-title { font-size: 17px; color: #f3f5f9; margin-bottom: 6px; letter-spacing: -.01em; }
.stream-load-status { display: flex; gap: 18px; margin-top: 10px; font-size: 11px; color: #acb7c7; }
.legend-leading { color: #add2ff; }
.legend-trailing { color: #f1cf9a; }
.stream-controls { pointer-events: auto; width: 350px; padding: 14px 18px; background: rgba(12,17,26,.7); backdrop-filter: blur(18px); border: 1px solid rgba(180,195,215,.16); border-radius: 12px; }
.stream-controls[hidden] { display: none; }
.playback-row { display: flex; align-items: center; gap: 6px; justify-content: space-between; }
.playback-row button { border: 0; background: none; color: #dce5f3; cursor: pointer; font-size: 12px; padding: 4px 7px; min-height: 36px; }
.playback-row button:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.playback-row output { color: #b4c1d4; font-size: 12px; min-width: 57px; text-align: right; font-variant-numeric: tabular-nums; }
.timeline-label { display: block; font-size: 10px; color: #929fb3; margin: 6px 0 3px; }
#stream-timeline { width: 100%; display: block; accent-color: #a8bfdc; cursor: pointer; min-height: 22px; }
.profile-introduction { padding-block: 55px 40px; }
.profile-introduction > p { font-size: 18px; line-height: 1.75; color: #525862; max-width: 920px; margin: 0 0 32px; }
.research-index-nav { display: flex; flex-wrap: wrap; gap: 14px 32px; font-size: 13px; }
.research-index-nav a { color: #3c506b; display: inline-flex; align-items: center; min-height: 38px; }
.research-section { padding-block: 62px 68px; border-top: 1px solid #dce0e5; }
.research-section-heading { display: flex; gap: 25px; align-items: baseline; margin-bottom: 42px; }
.section-number { font-size: 12px; color: #8b939e; font-variant-numeric: tabular-nums; }
.research-section-heading h2 { font-size: 36px; line-height: 1.2; letter-spacing: -.025em; margin: 0; font-weight: 500; }
.research-section h3 { font-size: 21px; line-height: 1.3; font-weight: 600; letter-spacing: -.015em; margin-bottom: 18px; }
.research-section p { color: #555b64; font-size: 16px; line-height: 1.8; }
.research-row { display: grid; grid-template-columns: .86fr 1.14fr; align-items: start; gap: 56px; margin-bottom: 56px; }
.research-row:last-child { margin-bottom: 0; }
.research-copy p:last-child { margin-bottom: 0; }
.research-figure { margin: 0; padding: 0; min-width: 0; }
.research-figure > a { display: block; background: #fff; border: 1px solid #e5e7eb; padding: 12px; border-radius: 8px; }
.research-figure img { width: 100%; height: auto; }
.research-figure figcaption { color: #7a818c; font-size: 11px; line-height: 1.65; margin-top: 12px; }
.research-figure figcaption a { color: #576b85; }
.section-introduction { max-width: 900px; margin-bottom: 30px; }
.method-grid { display: grid; grid-template-columns: 1fr 1fr; column-gap: 60px; row-gap: 20px; margin-block: 35px 40px; }
.method-grid h3 { font-size: 18px; margin-bottom: 12px; }
.paper-figure-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; margin-bottom: 36px; }
.paper-figure-grid .research-figure > a { min-height: 285px; display: grid; align-items: center; }
.asteroid-gallery { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; max-width: 900px; margin: 0 auto; }
.asteroid-gallery figure { margin: 0; overflow: hidden; border-radius: 10px; background: #090c11; }
.asteroid-gallery img { width: 100%; height: auto; display: block; }
.research-section .gallery-caption { max-width: 900px; margin: 12px auto 38px; color: #7a818c; font-size: 12px; }
.research-text-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.research-text-columns p:last-child { margin-bottom: 0; }
.skill-list { display: grid; }
.skill-item { display: grid; grid-template-columns: 240px 1fr; gap: 35px; padding-block: 28px; border-bottom: 1px solid #e1e4e9; }
.skill-item:first-child { padding-top: 0; }
.skill-item:last-child { padding-bottom: 0; border-bottom: 0; }
.research-section .skill-item h3 { margin: 3px 0 0; font-size: 18px; font-weight: 500; }
.skill-item p { max-width: 720px; margin: 0; }
@media (max-width: 899px) {
  .stream-hero { height: calc(100svh - 63px); min-height: 650px; }
  .hero-profile { top: 30px; gap: 17px; }
  .profile-avatar { width: 65px; height: 65px; flex-basis: 65px; }
  .hero-profile h1 { font-size: 34px; }
  .hero-profile p { font-size: 12px; }
  .stream-caption { gap: 20px; bottom: 34px; }
  .stream-controls { width: 310px; padding: 10px 12px; }
  .stream-caption > div:first-child { max-width: 245px; }
  .research-row { grid-template-columns: 1fr; gap: 25px; margin-bottom: 45px; }
  .research-row .research-figure { max-width: 780px; }
  .research-section-heading h2 { font-size: 32px; }
  .method-grid,.research-text-columns { gap: 25px 35px; }
  .paper-figure-grid .research-figure > a { min-height: 190px; }
  .skill-item { grid-template-columns: 190px 1fr; gap: 22px; }
}
@media (max-width: 600px) {
  .stream-hero { min-height: 720px; }
  .hero-profile { top: 25px; gap: 13px; align-items: start; }
  .profile-avatar { width: 54px; height: 54px; flex-basis: 54px; border-radius: 8px; }
  .hero-profile h1 { font-size: 28px; margin-bottom: 9px; }
  .hero-profile p { font-size: 10px; max-width: 245px; line-height: 1.6; }
  .stream-caption { flex-direction: column; align-items: stretch; gap: 12px; bottom: 28px; }
  .stream-caption > div:first-child { max-width: none; }
  .stream-caption .stream-caption-title { font-size: 15px; }
  .stream-caption p { font-size: 11px; }
  .stream-controls { width: 100%; max-width: 350px; padding: 7px 12px; align-self: stretch; }
  .profile-introduction { padding-block: 35px 28px; }
  .profile-introduction > p { font-size: 16px; margin-bottom: 22px; }
  .research-index-nav { gap: 5px 20px; font-size: 12px; }
  .research-index-nav a { min-height: 40px; }
  .research-section { padding-block: 40px 45px; }
  .research-section-heading { gap: 15px; margin-bottom: 30px; }
  .research-section-heading h2 { font-size: 28px; }
  .research-section p { font-size: 15px; }
  .research-section h3 { font-size: 20px; }
  .method-grid,.research-text-columns,.paper-figure-grid { grid-template-columns: 1fr; gap: 22px; }
  .paper-figure-grid { margin-bottom: 28px; }
  .paper-figure-grid .research-figure > a { min-height: 0; }
  .research-figure > a { padding: 7px; }
  .research-figure figcaption { font-size: 10px; }
  .asteroid-gallery { gap: 8px; }
  .method-grid { margin-block: 25px 28px; gap: 10px; }
  .method-grid h3 { font-size: 18px; }
  .skill-item { grid-template-columns: 1fr; gap: 14px; padding-block: 24px; }
  .research-section .skill-item h3 { margin-top: 0; }
}
@media print {
  .stream-hero { height: 250px; min-height: 0; color: #000; background: #fff; }
  #stream-canvas,.stream-caption { display: none; }
  .hero-profile { top: 30px; }
  .hero-profile p { color: #333; }
  .research-section { padding-block: 25px; }
  .research-row,.research-text-columns,.method-grid { break-inside: avoid; }
}

#stream-canvas[hidden] { display: none; }